/**
  * @param \Psr\Cache\CacheItemInterface $item
  * @return mixed
  */
 protected function driverRead(CacheItemInterface $item)
 {
     $data = zend_disk_cache_fetch($item->getKey());
     if ($data === false) {
         return null;
     }
     return $data;
 }

 protected function _get($key)
 {
     $data = zend_disk_cache_fetch($this->key($key));
     if ($data === null) {
         return self::NOT_FOUND;
     }
     return $data;
 }

 /**
  * Fetch multiple items from Zend Data Disk Cache
  *
  * @param  array $internalKeys
  * @return array All found items
  * @throws Exception\RuntimeException
  */
 protected function zdcFetchMulti(array $internalKeys)
 {
     $items = zend_disk_cache_fetch($internalKeys);
     if ($items === false) {
         throw new Exception\RuntimeException("zend_disk_cache_fetch(<array>) failed");
     }
     return $items;
 }

 /**
  * Fetch data
  *
  * @param string $id          Cache id
  */
 protected function _fetch($id)
 {
     return zend_disk_cache_fetch($this->_options['namespace'] . '::' . $id);
 }

 /**
  * {@inheritdoc}
  */
 public function has($key)
 {
     return zend_disk_cache_fetch($key) !== false;
 }

 /**
  * Get a cache variable
  *
  * Retrieve a variable from the cache and return it's
  * value to the user.
  *
  * @param  string $name  The name of the cache variable to retrieve.
  *
  * @return mixed         The value of the retrieved variable or false if
  *                       variable isn't found.
  */
 public function get($name)
 {
     return zend_disk_cache_fetch($name);
 }

 public function get($key)
 {
     $safeKey = $this->makeKey($key);
     $ret = @zend_disk_cache_fetch($safeKey);
     return $ret;
 }

 /**
  * {@inheritdoc}
  */
 public function get($key)
 {
     return zend_disk_cache_fetch($key);
 }

 /**
  * Read datas with $uid key
  * @param mixed $uid
  * @return mixed
  */
 public function read($uid)
 {
     return zend_disk_cache_fetch($uid);
 }